发明名称 |
ARRANGEMENT AND METHOD FOR REGULATING BOTTOM HOLE PRESSURES WHEN DRILLING DEEPWATER OFFSHORE WELLS |
摘要 |
An arrangement and a method to control and regulate the bottom hole pressure in a well during subsea drilling at deep waters: The method involves adjustment of a liquid/gas interface level in a drilling riser up or down. The arrangement comprises a high pressure drilling riser and a surface BOP at the upper end of the drilling riser. The surface BOP havs a gas bleeding outlet. The riser also comprises a BOP, with a by-pass line. The drilling riser hasan outlet at a depth below the water surface, and the outlet is connected to a pumping system with a flow return conduit running back to a drilling vessel/platform.
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申请公布号 |
WO03023181(A1) |
申请公布日期 |
2003.03.20 |
申请号 |
WO2002NO00317 |
申请日期 |
2002.09.10 |
申请人 |
OCEAN RISER SYSTEMS AS;FOSSLI, BOERRE |
发明人 |
FOSSLI, BOERRE |
分类号 |
E21B21/00;E21B21/01;E21B21/08;E21B21/10;(IPC1-7):E21B21/08;E21B43/36 |
主分类号 |
E21B21/00 |
代理机构 |
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代理人 |
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主权项 |
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